Hawaiian Whales Show 'No Overt Response' To Sounds Of ATOC Simulation
...need to learn about whales, especially about their sensitivity and response to sounds," Frankel commented. "Unfortunately, you can't just call a sperm whale into the lab, put on a set of earphones and give it a hearing test. So we're proceeding very cautiously." ATOC-Marine Mammal Research Program scientis......r level. "We have three orders of magnitude better sensitivity than what was possible before. The biggest thing about this is that you can get a complete identification of a totally unknown molecule. Just knowing the molecular weight at our accuracy level is a big help," said Fred W. McLafferty, Cornell profes...Optical Microscopy Shines Light On Biology
... large damping caused by the water." With the high sensitivity of near-field scanning optical microscopy and the newly developed cantilevered probe, researchers can examine individual biological molecules. "It's important to see what single proteins do and map their distribution in a system," he said. "If you ca...Urbanized Watersheds More Sensitive To Climate Change
...De Walle is trying to see how urbanization affects sensitivity of stream flow to climate change. Using population data from the U.S. Census Bureau, precipitation information from the National Weather Service and stream flow data from the U.S. Geological Survey, he is looking at four regions of the U.S. -- th......mental stress." Their study, "Environmental stress sensitivity of an ascorbic acid-deficient Arabidopsis mutant," in the Proceedings of the National Academy of Sciences, was reported by Last, Patricia L. Conkin, a postdoctoral fellow with Boyce Thompson and Elizabeth H. Williams, a Cornell undergraduate student.......col and ampicillin -- thus restoring thebacteria's sensitivity to the antibiotics in laboratory cultures. If suc...Restoring Drug Sensitivity To restore the sensitivity of E. coli bacteria to either chloramphenicolorampicillin, the Yale biologists crafted synthetic gen...Altered Genes, Altered Metabolism--Longer Life?
...d to testable ideasfor the way glucose and insulin sensitivity affect human longevity. Leadresearcher and NIA grantee Dr. Gary Ruvkun of Massachusetts General Hospitalspeculates that a downshifting of glucose metabolism in times of stress helpsthe worm live longer. Dr. David Finkelstein, of NIA's Biology of Agi...Common Food Dye Can Cause Severe Allergic Reactions
...es, and the patient demonstrated a severe allergic sensitivity to one of them---cochineal extract. The docto...lt: the patient's husband demonstrated an allergic sensitivity to cochineal extract in the spots on his arms where the serum was injected. That, combined with...Biological Clocks No Longer Found Only In The Brain
...se of smell, much as they influence light and pain sensitivity in mammals. While the authors raise the possibility that this evidence challenges the current notions about the role of the brain as the seat that coordinates rhythms throughout the organism, they acknowledge that the brain still retains a certa...Tiger Beetles Go Blind At High Speeds
...hase, the next research step is to learn about the sensitivity of the beetle's photoreceptors, which receive photons and then process those photons into the neurological information that is sent to the beetle's brain. Through this research, he said, science will find out more about this biological tracking syst...'Rolling Circles' Provide New Way to Amplify and Detect DNA
...pen the door to new procedures requiring very high sensitivity -- such as detection of DNA sequences in organisms' genomes, for instance, or identification of specific cancer-related mutations. The new method of DNA production uses as its template a single piece of circular DNA far smaller than that found i...Jefferson Researchers First To Create Genetically Engineered Mouse To Study Photoaging
...mouse is ahuge advance because of the rapidity and sensitivity with which we are able tomeasure results," said Dr. Bernstein. "Other mouse models have taken at leastsix months to a year to show effects of photodamage caused by irradiation." The researchers were also able to apply sunscreens and related ...New Sensor Will Detech Chemical And Biological Pathogens At Incredibly Small Doses
... now be detected. "The newbiosensor approaches the sensitivity of a dog sniffing airborne chemicals,"Velander adds. Another advantage of the new sensor is its speed. Current technology fordetecting certain pathogens, in addition to being less sensitive, is also timeconsuming. It typically requires an hour or mo...ACS Conference Brief: An Innovative Molecular Assembly
...rinterest -- calixarene and porphyrin, which has a sensitivity to light thatcan be manipulated by changes in pH conditions. At the American Chemical Society's meeting in Dallas on March 29, RichardKhoury, a post-graduate chemistry researcher, will describe the first constructionof a calix[4]arenoporphyrin (pron...Study Finds Some People Are 'Born To Smoke'
...luster ofcharacteristics that go hand-in-hand with sensitivity to nicotine, or to developa test for biological sensitivity. Once there is a simple way to identifychildren at high risk of becoming smokers, they can be targeted for specialpreventive efforts, Pomerleau says. He and colleagues from the U-M, Washin...Researchers Discover How Ulcer Bug Becomes Antibiotic-Resistant
...iment showed that rdxA alone confers metronidazole sensitivity and that its loss of function is sufficient to cause resistance. "It was very satisfying to see that the altered strains, whose only difference from the wild type was having this inactivated gene, showed metronidazole resistance," says Douglas E. Ber...Antioxidants May Reduce Harmful Complications Of Diabetes
...gs referred to assulfonylureas, which increase the sensitivity of receptors to insulin throughoutthe body. Half the patients exhibited microalbuminuria, the excretion of tinyamounts of protein in the urine that is considered a precursor of kidneydisease, while the other half did not. The researchers too...Cancer Test May Offer High-Risk Groups Quick, Affordable Screening For Tumors
...uld before," says Brusilow. If the test's sensitivity is confirmed, Brusilow believes it may bepossible to adapt it for administration through bacterial inhibition assays, aninexpensive technique commonly used to screen newborn babies for phenylketonuriaand other diseases. "We're still relativel...New Model Makes It Possible To Predict Emergence Of Antiviral Drug Resistance
...sease experts. "The results of the uncertainty and sensitivity analyses demonstrated," saidBlower, "that increasing treatment rates would be extremely beneficial if thereis a low probability that acquired drug-resistance will develop and/or if thedrug-resistant strains that emerge are of low transmissibility. C...